LG 27GN650-B Monitor Review

Tested using Methodology v1.1
Reviewed Apr 01, 2021 at 11:37 am
LG 27GN650-B Picture
7.6
Mixed Usage
7.5
Office
8.2
Gaming
7.5
Multimedia
7.5
Media Creation
6.8
HDR Gaming
Size 27"
Resolution 1920x1080
Max Refresh Rate
144 Hz
Pixel Type
IPS
Variable Refresh Rate
Adaptive Sync

The LG 27GN650-B is a great budget gaming monitor. It has low input lag, a 144Hz refresh rate, and exceptional response times to deliver fluid and responsive gameplay. It supports FreeSync natively and is certified as G-SYNC compatible. It doesn't have the best ergonomics because it can't swivel at all, but it's still a good choice for sharing content and co-op gaming thanks to its wide viewing angles. While its 27 inch screen feels immersive, its 1080p resolution might be too low for some, especially for work and media consumption. Lastly, it can only deliver an okay HDR experience because it has a low contrast ratio, no local dimming, and doesn't get bright enough to make highlights pop the way they should.

Our Verdict

7.6 Mixed Usage

The LG 27GN650-B is a good monitor overall. It's great for gaming because it has low input lag, a high refresh rate, fast response times, and VRR support, resulting in a smooth and responsive gaming experience. It's good for work and media consumption, but its 1080p resolution might be too low for some. It's okay for gaming in HDR, although it's mainly due to its great gaming performance, as it doesn't get bright enough for a true HDR experience, has a low contrast ratio, and lacks local dimming.

Pros
  • Large screen size.
  • Wide viewing angles.
  • Good visibility in most lighting conditions.
  • Flicker-free backlight.
Cons
  • 1080p resolution might be too low for some.
  • Terrible ergonomics.
  • Mediocre contrast ratio.
7.5 Office

The LG 27GN650-B is good for office use. It has a large 27 inch screen, but the pixel density is a bit low because it's limited to a 1080p resolution, so text and images may look a bit blurry. It has an IPS panel with wide viewing angles, which is great for sharing your work with colleagues. It handles reflections well but doesn't get very bright, so it's better suited for a moderately-lit room as it might not be able to overcome intense glare. Unfortunately, the stand doesn't swivel at all.

Pros
  • Large screen size.
  • Wide viewing angles.
  • Good visibility in most lighting conditions.
Cons
  • 1080p resolution might be too low for some.
  • Terrible ergonomics.
8.2 Gaming

The LG 27GN650-B is a great gaming monitor. It has low input lag, a 144Hz refresh rate, and exceptionally fast response times, resulting in smooth and responsive gameplay. It supports FreeSync natively and is compatible with G-SYNC to reduce screen tearing. Sadly, it's not the best for gaming in the dark, as its mediocre contrast ratio makes blacks appear gray. Its 1080p resolution might disappoint some, but it does make it easier for your PC to reach higher frame rates.

Pros
  • Exceptional response times.
  • 144Hz refresh rate.
  • Large screen size.
  • VRR support.
Cons
  • Terrible ergonomics.
  • Mediocre contrast ratio.
7.5 Multimedia

The LG 27GN650-B is good for media consumption. It has a large screen with wide viewing angles, great for sharing content, but its 1080p resolution might be disappointing to some. It handles reflections well and gets bright enough to combat glare in most lighting conditions. Unfortunately, it has a low contrast ratio that makes blacks appear grayish in the dark, and its sub-par ergonomics make it hard to place the screen at a comfortable viewing position.

Pros
  • Large screen size.
  • Wide viewing angles.
  • Good visibility in most lighting conditions.
Cons
  • 1080p resolution might be too low for some.
  • Terrible ergonomics.
7.5 Media Creation

The LG 27GN650-B is good for content creation. It has full sRGB coverage, superb gradient handling, and no color bleed. It's great for sharing your work with coworkers and clients thanks to its wide viewing angles. However, the ergonomics are somewhat limited, and while it has a large 27 inch screen, its 1080p resolution isn't ideal if you tend to work with higher-resolution content.

Pros
  • Large screen size.
  • Wide viewing angles.
  • Good visibility in most lighting conditions.
  • Full sRGB coverage.
Cons
  • 1080p resolution might be too low for some.
  • Terrible ergonomics.
6.8 HDR Gaming

The LG 27GN650-B is okay for gaming in HDR. It delivers smooth gameplay thanks to its low input lag, 144Hz refresh rate, and fast response times. However, even though it can display a wide color gamut, it doesn't get very bright in HDR, not enough to make highlights pop the way they should. Also, it has a low contrast ratio and lacks local dimming.

Pros
  • Exceptional response times.
  • 144Hz refresh rate.
  • Large screen size.
  • VRR support.
Cons
  • Terrible ergonomics.
  • Mediocre contrast ratio.
  • No local dimming.
  • Doesn't get bright enough for true HDR experience.
  • 7.6 Mixed Usage
  • 7.5 Office
  • 8.2 Gaming
  • 7.5 Multimedia
  • 7.5 Media Creation
  • 6.8 HDR Gaming
  1. Updated Apr 01, 2021: Review published.
  2. Updated Mar 30, 2021: Early access published.

Test Results

perceptual testing image
Design
Design
Style
Curved No
Curve Radius Not Curved
Weight (without stand)
11.0 lbs (5.0 kg)
Weight (with stand)
15.9 lbs (7.2 kg)

The LG 27GN650-B has the same design as most other 2020 LG UltraGear monitors, like the LG 27GN850-B. It has a flat, non-curved screen with thin borders on three sides and a thicker bottom bezel. It's mostly black with some red accents on the stand and the back.

Design
Stand
Width
16.7" (42.5 cm)
Depth
11.7" (29.8 cm)

The V-shaped stand is relatively wide, but the feet are very thin, leaving more usable desk space. It feels sturdy, and the screen doesn't wobble much.

5.9
Design
Ergonomics
Height Adjustment
4.3" (11.0 cm)
Switch Portrait/Landscape Yes, Clockwise
Swivel Range No swivel
Tilt Range -15° to 5°

The LG 27GN650-B has sub-par ergonomics. The tilt range is fairly narrow, and it can't swivel at all.

Design
Back
Wall Mount VESA 100x100

The back is plain except for the UltraGear branding and red accent ring. The cutout on the stand is for cable management.

Design
Borders
Borders
0.3" (0.8 cm)
Design
Thickness
Thickness (with stand)
8.9" (22.6 cm)
Thickness (without stand)
2.2" (5.7 cm)

The screen itself is thin, but the stand is thick, so you'll need a deep desk to put it on.

7.0
Design
Build Quality

The LG 27GN650-B's build quality is decent. It's mostly plastic and doesn't feel particularly premium, but there are no issues with the construction. That said, the cable management cutout feels pretty flimsy.

Picture Quality
6.0
Picture Quality
Contrast
Native Contrast
1,002 : 1
Contrast With Local Dimming
N/A

Like most IPS panels, the LG 27GN650-B has a mediocre contrast ratio, which makes blacks appear grayish when viewed in a dark environment. It matches the advertised 1000:1 contrast almost perfectly; however, this can vary between units. If you're looking for a similar budget model with better contrast, check out the LG 32GN600-B.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

The LG 27GN650-B doesn't have a local dimming feature. The video above is provided for reference only.

7.2
Picture Quality
SDR Peak Brightness
SDR Real Scene
270 cd/m²
SDR Peak 2% Window
283 cd/m²
SDR Peak 10% Window
284 cd/m²
SDR Peak 25% Window
284 cd/m²
SDR Peak 50% Window
285 cd/m²
SDR Peak 100% Window
285 cd/m²
SDR Sustained 2% Window
282 cd/m²
SDR Sustained 10% Window
284 cd/m²
SDR Sustained 25% Window
284 cd/m²
SDR Sustained 50% Window
284 cd/m²
SDR Sustained 100% Window
284 cd/m²
SDR ABL
0.000

LG 27GN650-B has decent SDR peak brightness. It's very consistent across different content, but it falls short of the advertised 350 cd/m². It's bright enough for a dark to moderately-lit room, but it might not be able to overcome intense glare in a well-lit room. We managed to reach 295 cd/m² before calibration in the 'HDR Effect' Picture Mode, with Contrast set to max, but this comes at the cost of image accuracy.

We measured the SDR peak brightness after calibration in the 'Gamer 1' Picture Mode, with Brightness set to max.

6.4
Picture Quality
HDR Peak Brightness
HDR Real Scene
347 cd/m²
HDR Peak 2% Window
361 cd/m²
HDR Peak 10% Window
362 cd/m²
HDR Peak 25% Window
362 cd/m²
HDR Peak 50% Window
363 cd/m²
HDR Peak 100% Window
363 cd/m²
HDR Sustained 2% Window
361 cd/m²
HDR Sustained 10% Window
361 cd/m²
HDR Sustained 25% Window
362 cd/m²
HDR Sustained 50% Window
362 cd/m²
HDR Sustained 100% Window
362 cd/m²
HDR ABL
0.000

The LG 27GN650-B has mediocre HDR peak brightness. It's a bit brighter than in SDR, though not by much, and nowhere near enough to make highlights stand out the way they should in HDR. That said, it maintains the brightness very consistently across different content.

We measured the HDR peak brightness in the 'Gamer 2' Picture Mode with Brightness set to max.

8.3
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
44°
Color Washout From Right
46°
Color Shift From Left
50°
Color Shift From Right
51°
Brightness Loss From Left
47°
Brightness Loss From Right
49°
Black Level Raise From Left
70°
Black Level Raise From Right
70°
Gamma Shift From Left
56°
Gamma Shift From Right
56°

The LG 27GN650-B has great viewing angles, which means images remain accurate when viewed from the side, good for sharing content and playing co-op games.

6.4
Picture Quality
Vertical Viewing Angle
Color Washout From Below
33°
Color Washout From Above
35°
Color Shift From Below
30°
Color Shift From Above
33°
Brightness Loss From Below
39°
Brightness Loss From Above
42°
Black Level Raise From Below
40°
Black Level Raise From Above
22°
Gamma Shift From Below
32°
Gamma Shift From Above
34°

The LG 27GN650-B's vertical viewing angles aren't bad, but there's still some loss of image accuracy when viewing from below or above.

8.7
Picture Quality
Gray Uniformity
50% Std. Dev.
3.000%
50% DSE
0.104%
5% Std. Dev.
0.551%
5% DSE
0.051%

Gray uniformity is excellent, although this can vary between individual units. The sides are a bit darker, but thankfully, there's almost no dirty screen effect in the center. Uniformity is much better in near-dark scenes.

3.4
Picture Quality
Black Uniformity
Native Std. Dev.
3.745%
Std. Dev. w/ L.D.
N/A

Our unit has terrible black uniformity. There's clouding throughout the screen, as well as visible backlight bleed along the top and bottom edges. Note that black uniformity varies between individual units.

8.0
Picture Quality
Pre Calibration
Picture Mode
Gamer 1
Luminance
285 cd/m²
Luminance Settings
100
Contrast Setting
70
RGB Controls
50-50-50
Gamma Setting
Mode 2
Color Temperature
6,546 K
White Balance dE
2.69
Color dE
2.37
Gamma
2.16

The LG 27GN650-B has great accuracy out of the box. Most colors and shades of gray are only slightly inaccurate and hard to spot. The color temperature is very close to our 6500K target, just a bit on the cooler side. Gamma follows the sRGB curve relatively well, but most dark scenes appear brighter than they should. There isn't a dedicated sRGB Picture Mode. Note that accuracy varies between units.

9.5
Picture Quality
Post Calibration
Picture Mode
Gamer 1
Luminance
100 cd/m²
Luminance Settings
46
Contrast Setting
70
RGB Controls
49-49-52
Gamma Setting
Mode 2
Color Temperature
6,471 K
White Balance dE
0.85
Color dE
0.46
Gamma
2.18

Accuracy is fantastic after calibration. The remaining inaccuracies aren't visible to the naked eye. The color temperature remains very close to our target, although slightly on the warmer side. Gamma is much improved, but very dark and very bright scenes are over-brightened.

You can download our ICC profile calibration here. This is provided for reference only and shouldn't be used, as the calibration values vary per individual unit due to manufacturing tolerances, even for the same model.

9.1
Picture Quality
SDR Color Gamut
sRGB xy
100.0%
Adobe RGB xy
82.2%
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

The LG 27GN650-B's SDR color gamut is outstanding. It has full coverage of the sRGB color space used in most content and great coverage of Adobe RGB, used in print photography.

9.3
Picture Quality
SDR Color Volume
sRGB In ICtCp
97.9%
Adobe RGB In ICtCp
87.7%
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

The SDR color volume is exceptional. It only has trouble displaying dark colors due to its low contrast ratio.

7.6
Picture Quality
HDR Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
88.8%
Rec. 2020 xy
64.1%
DCI P3 Picture Mode
Gamer 2
Rec. 2020 Picture Mode
Gamer 2

The LG 27GN650-B has a good HDR color gamut. It has excellent DCI P3 coverage, the color space used in most HDR content, but its coverage of the wider Rec. 2020 is only mediocre.

Note that our DCI P3 coverage is likely much lower than other reviewers. This is normal and is due to the way we measure DCI P3. We measure it by sending a Rec. 2020 signal, but unlike most reviewers, we limit the colors to the P3 primaries. This results in a lower but arguably more accurate measurement.

6.8
Picture Quality
HDR Color Volume
DCI-P3 In ICtCp
78.7%
Rec. 2020 In ICtCp
56.4%
DCI P3 Picture Mode
Gamer 2
Rec. 2020 Picture Mode
Gamer 2

The HDR color volume is okay. It doesn't display dark colors well because it has a low contrast ratio, and it also has trouble with very bright colors due to its relatively low HDR peak brightness.

10
Picture Quality
Image Retention
IR After 0 Min Recovery
0.00%
IR After 2 Min Recovery
0.00%
IR After 4 Min Recovery
0.03%
IR After 6 Min Recovery
0.00%
IR After 8 Min Recovery
0.00%
IR After 10 Min Recovery
0.03%

There's no image retention after displaying a high-contrast image for ten minutes. However, this can vary between individual units.

9.7
Picture Quality
Gradient
Color Depth
10 Bit

Gradient handling is superb. There's only a tiny amount of banding in the reds, but it shouldn't be noticeable in most content.

9.9
Picture Quality
Color Bleed
Pixel Row Error
0.000%
Pixel Column Error
0.027%

There's no color bleed. The small amount detected shouldn't be visible in regular content.

7.5
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
5.2%
Indirect Reflections
2.8%
Calculated Direct Reflections
2.4%

The LG 27GN650-B has good reflection handling. Visibility should be okay in most lighting conditions, but it may struggle a bit in bright, sunny rooms.

7.0
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

Text clarity is decent. Windows ClearType (top photo) makes diagonal lines look bolder, like on the R and N. However, it also makes vertical lines appear thinner, like on the T and I.

Motion
9.4
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Normal
Rise / Fall Time
4.1 ms
Total Response Time
7.3 ms
Overshoot Error
1.9%
Dark Rise / Fall Time
4.2 ms
Dark Total Response Time
7.6 ms
Dark Overshoot Error
2.1%

Overdrive SettingResponse Time ChartResponse Time TablesMotion Blur Photo
OffChartTablePhoto
NormalChartTablePhoto
FastChartTablePhoto
FasterChartTablePhoto

The LG 27GN650-B has an exceptional response time at its max refresh rate, resulting in clear motion with almost no blur trail behind fast-moving objects. The recommended overdrive setting is 'Normal' because 'Off' is slower, and the 'Fast' and 'Faster' options have too much overshoot, causing inverse ghosting.

8.6
Motion
Response Time @ 60Hz
Best Overdrive Setting
Off
Rise / Fall Time
5.6 ms
Total Response Time
13.3 ms
Overshoot Error
0%
Dark Rise / Fall Time
5.9 ms
Dark Total Response Time
12.2 ms
Dark Overshoot Error
0.0%

Overdrive SettingResponse Time ChartResponse Time TablesMotion Blur Photo
OffChartTablePhoto
NormalChartTablePhoto
FastChartTablePhoto
FasterChartTablePhoto

The response time at 60Hz is excellent. It's noticeably slower than at max refresh rate, which results in blurrier images in fast-moving scenes. The recommended overdrive setting is 'Off' because the other options have a lot of overshoot. This means you may have to change the overdrive setting if your game's frame rate drops.

10
Motion
Image Flicker
Flicker-Free Yes
PWM Dimming Frequency
0 Hz

The backlight is flicker-free at all brightness levels. This eliminates image duplication and helps reduce eye strain.

6.0
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
Yes
BFI Maximum Frequency
144 Hz
BFI Minimum Frequency
120 Hz

The LG 27GN650-B has a Black Frame Insertion feature. It's backlight strobing, to be more precise, as it flickers the backlight to reduce motion blur. It only works within a narrow refresh rate range, and it isn't usable simultaneously with VRR. Note that the BFI score is based on the minimum and maximum frequency at which it operates, not the BFI's performance.

9.0
Motion
Refresh Rate
Native
144 Hz
Max Refresh Rate
144 Hz
Variable Refresh Rate
Yes
FreeSync
Yes
G-SYNC
Compatible (NVIDIA Certified)
VRR Maximum
144 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors DisplayPort, HDMI

The LG 27GN650-B has a high refresh rate to deliver a smooth gaming experience. FreeSync and G-SYNC compatibility work over a wide refresh rate range; however, G-SYNC only works over a DisplayPort connection.

Inputs
9.5
Inputs
Input Lag
Native Resolution
4.1 ms
Native Resolution @ 60Hz
9.2 ms
Variable Refresh Rate
4.5 ms
Variable Refresh Rate @ 60Hz
9.8 ms
10 Bit HDR
4.1 ms
Black Frame Insertion (BFI)
9.3 ms

The input lag is exceptionally low. It's slightly higher with BFI enabled, but it shouldn't be noticeable to most people.

7.1
Inputs
Resolution And Size
Native Resolution 1920 x 1080
Aspect Ratio 16:9
Megapixels 2.1 MP
Pixel Density
82 PPI
Screen Diagonal 27.0"
Screen Area 310 in²

The LG 27GN650-B has a large screen size that feels immersive, but its pixel density is relatively low due to its 1080p resolution. It should be okay for most gamers, but it isn't the best for work and media consumption.

Inputs
Inputs
Inputs
Total Inputs
DisplayPort 1 (DP 1.4)
Mini DisplayPort No
HDMI 2 (HDMI 2.0)
DVI No
VGA No
DisplayPort Out No
USB 1 (USB 3.0)
USB C No
Analog Audio Out 3.5mm 1
Microphone In 3.5mm No
Digital Optical Audio Out No
Analog Audio Out RCA No
Power Supply External Brick

The USB 3.0 port is for firmware updates only.

Features
Features
Additional Features
RGB Illumination
No
Speakers
No
HDR10 Yes
Multiple Input Display
No

The LG 27GN650-B only has a few features, including:

  • Crosshair: Adds a virtual crosshair on the screen.
  • Reader Mode: Blue light filter to help reduce eye strain.
  • Black Stabilizer: Makes objects more visible in dark scenes.

Features
On-Screen Display (OSD)
Features
Controls

There's a joystick below the LG branding on the bottom bezel. It lets you power the monitor on/off and navigate the on-screen menu.

Features
In The Box

  • User guide
  • CD manual
  • Power supply
  • DisplayPort cable

Differences Between Sizes And Variants

We tested the 27 inch LG UltraGear 27GN650-B. The 24 inch LG 24GN650-B has mostly the same specifications, but it has a lower advertised peak brightness and doesn't support a wide color gamut. The LG 24GN600-B and LG 27GN600-B are also very similar, but they have a tilt-only stand. There are many monitors with various configurations in LG's UltraGear lineup, some of which you can see in the table below.

Model Size Resolution Panel Type Refresh Rate Notes
27GN650-B 27" 1920 x 1080 IPS 144Hz  
27GN750-B 27" 1092 x 1080 IPS 240Hz  
27GN850-B 27" 2560 x 1440 IPS 144Hz  
27GN950-B 27" 3840 x 2160 IPS 160Hz DisplayHDR 600
32GN50T-B 32" 1920 x 1080 VA 165Hz  
32GN650-B 32" 2560 x 1440 VA 165Hz  
34GN850-B 34" 3440 x 1440 IPS 160Hz DisplayHDR 400

If someone comes across a different type of panel or their 27GN650-B doesn't correspond to our review, let us know, and we'll update the review. Note that some tests, like the gray uniformity, may vary between individual units.

Our unit was manufactured in January 2021; you can see the label here.

Compared To Other Monitors

The LG 27GN650-B is a great budget gaming monitor with exceptional response times. However, its 1080p resolution on a 27 inch screen results in a relatively low pixel density, which isn't ideal for productivity and media consumption.

For more options, check out our recommendations for the best gaming monitors, the best 144Hz monitors, and the best 1080p monitors.

Gigabyte M27Q

The Gigabyte M27Q is better than the LG 27GN650-B overall. The Gigabyte has a higher refresh rate of 170Hz compared to the LG's 144Hz, and it has a 1440p resolution, whereas the LG is 1080p. The Gigabyte also has a wider color gamut, significantly higher peak brightness, and more features like a USB-C input, an integrated KVM, and a Picture-in-Picture/Picture-by-Picture mode. The LG has a slightly better response time at max refresh rate, but it's slower than the Gigabyte at 60Hz.

LG 27GL650F-B

The LG 27GN650-B is the newer version of the LG 27GL650F-B with identical features. The differences are that the 27GN650-B has response times and can display a wide color gamut, but the 27GL650F-B gets brighter in SDR and HDR.

LG 27GN800-B

The LG 27GN650-B and the LG 27GN800-B score similarly overall, but they're quite different. The 27GN650-B is a 1080p model, while the 27GN800-B is 1440p. Both monitors have the same 144Hz refresh rate, but the 27GN800-B has better response times. The 27GN800-B also has a wider color gamut, and it gets brighter in SDR. However, its ergonomics are significantly worse than the 27GN650-B's because it's limited to tilt adjustment only.

ASUS VG279Q

The LG 27GN650-B and the ASUS VG279Q are very similar 1080p, 144Hz monitors. Even though the ASUS scores slightly higher for gaming, the LG has much better response times, resulting in clearer images in fast-moving scenes. The ASUS gets a lot brighter to combat glare, so it might be a better choice if you tend to game in a well-lit room. It also has better ergonomics than the LG, which makes it easier to place the screen in an ideal viewing position.

ASUS TUF Gaming VG259QM

The LG 27GN650-B and the ASUS TUF Gaming VG259QM are both 1080p gaming monitors. The ASUS is better for gaming because it has a much higher refresh rate of 280Hz compared to the LG's 144Hz, and it also has better response times. However, it has a fairly high 60Hz input lag, making it less ideal for console gaming. It has better ergonomics than the LG and gets brighter to combat glare. It has a smaller screen than the LG, but this means it has a higher pixel density to display sharper images and text.

Gigabyte G27Q

The LG 27GN650-B and the Gigabyte G27Q are both great 144Hz gaming monitors. The main difference is that the LG has a 1080p resolution, while the Gigabyte is 1440p. Gaming-wise, the LG has much better response times at max refresh rate and 60Hz. However, the Gigabyte might be a better choice if you plan on using it for work due to its higher resolution. It's also better suited for well-lit rooms because it gets a lot brighter.

HP X24ih

The LG 27GN650-B and the HP X24ih are very similar overall. The main differences are that the HP has a smaller 24 inch screen, and it doesn't support HDR. The HP has better response times at max refresh rate and 60Hz. It also has wider viewing angles and higher peak brightness.

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